Description
Use-after-free vulnerability in the xc_cpupool_getinfo function in Xen 4.1.x through 4.3.x, when using a multithreaded toolstack, does not properly handle a failure by the xc_cpumap_alloc function, which allows local users with access to management functions to cause a denial of service (heap corruption) and possibly gain privileges via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | xen | 4.4.0-1 | — |
| Debian 13 | xen | 4.4.0-1 | — |
| Debian 12 | xen | 4.4.0-1 | — |
| Debian 7 | xen | 4.1.4-3+deb7u2 | DSA-3006-1 |
Advisories 1
- DSA-3006-1 xen - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- SUSE-SU-2014:0373 vendor-advisory
- [oss-security] 20140212 Xen Security Advisory 88 (CVE-2014-1950) - use-after-free in xc_cpupool_getinfo() under memory pressure mailing-list
- SUSE-SU-2014:0372 vendor-advisory
- http://xenbits.xen.org/xsa/advisory-88.html
- DSA-3006 vendor-advisory